If you tried to achieve a 19th-century standard of living on twenty hours of work per week, you would face three problems. First, many aspects of the 19th-century standard of living would be quite cheap nowadays, but are illegal. 19th-century-quality housing, sanitation, food, and medical care can't be legally provided today. Second, if you did manage to live a 19th-century lifestyle, you would probably be psychologically unable to cope with having a lifestyle so materially inferior to the people around you. Being denied comfort and medical care enjoyed by other people when you were in distress would offend your dignity. Third, even if you did manage to cope psychologically, you would be unable to participate meaningfully in society, because other people would draw conclusions about your strength of character or mental stability.<p>The only way to achieve Marx's dream would be to make a society-wide decision to apply productivity gains toward leisure instead of towards the material standard of living. But guess what: most people <i>like</i> to work, and everyone <i>needs</i> to feel productive to be psychologically healthy. I'm sure that was easy for someone like Marx to overlook when pondering the plight of people who were brutally overworked, but it changes the equation quite a bit. Plus, productivity translates into power, and everyone has a certain appetite for power.